Thanks Mirek,
your trike looks beautiful - great work. If you don't mind, I will
upload some documentation to our wiki.
I am used riding a two-wheeled python and feel a bit strange on a trike.
In this case handlebars help a lot. Exceptions are trikes with
Duschar-joint (leaning trikes). Keep us up to date on how the story
develops.
Best regards from Jürgen.
Am 08.03.2020 um 13:36 schrieb mircosoft@xxxxxxxxxx:
Hello pythoneers,============================================================
Reporting yet another Python trike finished and tested (see attached
picture). Thanks to you for all the advice and inspiration!
I'll take better pictures, write a detailed build report and update the
wiki page later.
Parameters:
pivot angle: 65 degrees
trail: -236 mm
wheelbase: 1526 mm
track width: 705 mm (planned to fit in doorways, failed by a few cm)
length: 2600 mm (planned to fit vertically between floor and ceiling,
failed by a few cm too)
seat height: 290 mm (intended as low as possible)
BB-seat diff: 91 mm (intended as low as possible)
BB-EOS: 661 mm
pivot-FWA: 320 mm
seat angle: 34..42 degrees (adjustable)
ground clearance: about 90 mm (just enough for speed bumps and low kerbs)
material: mild steel and plywood
weight: over 40 kg (plan exceeded by a lot)
cargo capacity: planned 100 kg, actual probably 200 (not tested yet)
pivot: 12 mm rod end bearings, adjustable
transmission: internal gear hub and double chainring
brakes: 180 mm disk front, coupled 90 mm drums rear
Riding behaviour:
Steering feels odd and twitchy, but that's probably just me not being
used to trikes and not having ridden a MBB in years. Cornering stability
looks good enough, no wipeouts yet. Climbing is excellent (slow but
steady, no wheel slip). Turning circle is larger than I'd like, but
still just enough to navigate right angle turns around our house. Top
speed, range etc. to be determined later.
Work to do:
Install some steering stop to prevent front mudguard hitting the seat,
measure generator output, design and install lights, make an underseat
bag and maybe enclose the cargo hold in a streamlined weatherproof
fairing (if the streamlining is worth the extra weight).
Regards
Mirek
